IMediaSample::SetSyncPoint method (strmif.h)

The SetSyncPoint method specifies whether the beginning of this sample is a synchronization point.


HRESULT SetSyncPoint(
  [in] BOOL bIsSyncPoint


[in] bIsSyncPoint

Boolean value that specifies whether this is a synchronization point. If TRUE, this is a synchronization point.

Return value

Returns S_OK or an HRESULT value indicating the cause of the error.


The filter that first generates the data in the sample should set this flag to TRUE or FALSE, as appropriate. For uncompressed video and PCM audio, set every sample to TRUE. For compressed video, set key frames to TRUE and delta frames to FALSE.

This flag is purely informational. Other filters downstream might check this flag; for example, a filter might need to skip to the next key frame.


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header strmif.h (include Dshow.h)
Library Strmiids.lib

See also

Error and Success Codes

IMediaSample Interface